Actuating mechanism for pressing machines



Oct. 4, 1932. E. DAVIS 1,881,174

ACTUATING- MECHANISM FOR PRESSING MACHINES Filed April 10. 1931 2 Sheets-Sheet 1 INVENTOR. ERNEST DAVIS.

A TTORNEYS Oct. 4, 1932. vjs 1,881,174

ACTUATING MECHANISM FOR PRESSING MACHINES Filed April 10, 1931 2 Sheets-Sheet 2 9o J .92. a 2g I! d INVENTOR. ERNEST DAVIS. 23 3 I ATTORNEY6.

' equally well on Patented a. 4, 1932 i'rrEs AT r Fries Entrust nnvrs, or SYRACUSE, YORK, AssieNon r0 THE rnosrnnrry COMPANY INC., 011' SYRACUSE, NEVI YORK, A GORFORATION @1 3 NEW YORK AGTUA'JIPING MECHANISM ron r tnssme MACHINES Application filed April 10,

, have been devised for garment and laundry pressing machines'with a view of obtaining a type of actuating mechanism which will work thin or thick work and'with' various thicknesses of padding on the buck.

A result soughtin such types of actuating mechanism is to obtain'heavy pressure by the I use of a minimum amount ofworking fluid,

and to avoid the necessity of follow-up adjustinent to compensate for changes in the I? thickness of the work or pad-ding.

A modern type. of-actuating mechanism which has proveditself quite successful is commonly known as the pry-bar or cam-bar actuating mechanism andincludes a toggle which moves into position over one end of a pry-bar as the pressing element moves into lightcontact'with theworkh The position of the toggle with respect to the pry-bar will depend on the thicknessof the work and the 2V depression of the padding but p'rovisionis made to boost the toggle, by means of the pry bar, regardless of the position of the toggle when' the pressing elements are in light contact. In the past considerable difficulty has been experienced due to the fact that the bearing surfaces between the toggle and prybar have been necessarily so shapedthat line contact only was obtained when boosting the toggle and due to the tremendous pressures exerted the line contact caused ridges to form in thebearing face of the pry-bar and these ridges seriously interferedwith the efficient operation of the actuating mechanism.

Theprincipal object of this invention is to provide a pressing machine having actuating mechanism of the pry-bar type in which the engaging surfaces of the actuating mecha- 'nism-are mounted so'that they have surface contact, during the entire boosting operation,

re ardless of the thickness of the work or the padding on the buck. A further object'o'f the invention is to providea' bearing member or shoe for engaging with the pry-bar mecha nism, and to mountthe bearing member on an equalizing mounting so that it is held in nor- 1931. Serial No. 529,052.

mal position by springs but it is shift-able to automatically obtain surface contact with the pry-bar mechanism regardless of the relative position ofthe bearing'member and the prybar mechanism when the press is closed under light pressure.

A further object of the invention is to provide a pry-bar mechanism having a replaceable bearing facewhich may be conveniently removed and a new bearing face substituted in the eventrof damage or serious wear materially affecting the bearing face so as to impair its etlicient operation, A furtherobjee't of-the invention is to provide an actu ating mechanism of the pry-bar type in whichand in the combinations and constructions hereinafter set forth and claimed. 1

In describing this invention reference is bad to the accompanying drawings in which like f characters designate corresponding parts in all theviews.

Figure l is a diagrammatic side elevation, partly in section, of a pressing machine embodyingthe invention. V Figure 2 is an enlarged fragmentary view, partly in section, of a portion of the actuating mechanism shown in Figure 1.

Figure 3 is a view along the line 3-3 of Figure 2.

Figure 4 is an enlarged view of a portion of the mechanism shown in Figure 3.

' Figure 5 is a section along the line 5-5 of Figure 4. I I

Figure 6is a section along the line 6-6 of Figure l.

The invention is shown as applied to a pressing machine having a movable pressing element or head 11 carried by a yoke 12 which is pivotally mounted at'll on a pressing machine frame 16. The head 11 is movable into ed on a neck '20 supported by the pressing V machine frame. :The yoke 12 is pivotally connected at 22 with ,a link 24 which is pivpreliminary closed position. 7 Heavy pressure is applied tothe pressingjelements by means of pry-barmechanism.

otally connected at25 with an extendible link 26. The extendible link 26 is pivotally connectedat 28 With the pressing machine frame '16, and agforwardly extending arm 30', formed on the lower end of the link 26 ,ris

connected With a counterspring 32. The up-, perjend of the sprlng -32 is connected at 34 with the pressing" machine frame 16. f The links 24 and 26 form a toggle and the ooun-" terspring 32 normally {holds the. toggle in brokenposition so that the pressing elements" 1 willbeout of contact and; the pressiopen.

A fluid motor 36 isfoscillatably connected at 38- with the pressing machine frame 16; A piston rod 40, of the-fluid motor-36, is piv-' otally connected at 42'with the upperlend of 'the link 24, 'or may be connected directly to the yoke 12. r -When' working fluid islsupplied to the fluid motor 36, the-piston-rod, will beactuated'tocmove the yoke 12 and bring theh'eadll into light pressure contact with the buck 18 thus moving This pry-bar mechanism'includesa boosterbar 46 whichis-pivotally connected at 47 with the pressing machine frame 16. The booster-bar'46-is operated by a pry-bar 48 which is pivotally connected at 50 with the pressing machine frame 16. A fluid motor 52 is o'scill'atably mounted'at 54 on the pressing machine frame and is pivotally'connected at -56 with the pry-bar 48." A spring 58, connected at its lower jend with the pry-.bar'48 and at'its upper end with the pressing machine frame; normally holds' theVpry-bar in raised position as showninFigure 1. i a

V Qne end of the pry-bar 48 is formed a ayoke60 and straddles the booster-bar 46; A roller 62is-mounted between the two sides of the yoke'60 and contacts'with the lower side of the booster-bar 46.'

' /Vhen Workihgfluid issuppliedto 'fluid'motor 52 the pry-bar48 will be actuated/about itsl pivotal con'ne'ctionbO and" "the roller 62 will operate-to raise the end of the booster-bar46 an'djthus apply heavy pressure to the pressing elements in Jamaiiner later' 't'o be described I The booster-bar 46 is provided with abearing portion 64 which is held in-position by" suitable means such as screws 66. 1 The bearing face of the bearing portion 64 is preferably in the form of a groovehaving' sloping sides as shown-in Figure-3 and this groove isin the form of an are about theipivot point the pressinto operation.

a slot 72 in the bearing memberTO and due 7 to the fact that this opening is 'in'the form of a slot it ispossible for the bearing mem:

ber '70 to rotate through a considerab-leangle on theshaft 68 beforetheends-ofthe slot 72 strike against the link24f 'Lugs 75 are provided on" the bearing member'TO and these lugs are preferably formed with recesses 76 for receiving springsl78j." Screws 80, which are threaded intothelugs75 along'theaxis of the recesses 76; assist in holding springs 78 in'proper position. L y

The upper endfo-fth e link 26 is provided 5 withgmembers82ewhich are spaced apart a sufiicient distance to receive the shaft 68 between'them as shown in Figure 4L Screws engage the [shaft 68- along its 7- axis ,to pro: vide the pivotal connection between the links 24 and'26. Since thepivotal connection between the links 24 and 26 is never subjectto much strain the screws84 engaging recesses in the ends of theshaft 68yprovides asatis factory pivotal connection; Lugs 85 are'prd' vided on one of the membersa82'in position to engage the springs 7 8; a

84 areithrea'ded into the members 82, and

Since he lugs are an -integral part of J the members 82, which are provided on the upper ends of the link 26*,it will be obvious 5 that the bearing member'ZO" will normally. be held in line "with'the linkl26l lNhen the booster-bar 46 is operated to boost the bear on the shaftf68as .much as necessary to permit-the bearing member 70 to'rem'ainf in surface contact with the booster-bar 46. The lower side ofthe bearing member (dis pro- Vided with a wedgeshaped bearing-face designed to fit the groove in the bearing portion 64 ofthe booster-b'ar-46. l This. bearing ing member 70 and link 24 the"- springs 78 will permit the bearingfmember 70 torotate; F

men1ber70 thu's provides in effect afloating 7 shoe having surface contact with; the boost er bar 46' at all'timesduring heavy pressure- [Since the link '26 is-" 'pivot'allyi en ineered V atcja fixed point 28 with the pressing ma chi ne iramelt is necessary to provide means by WlllChthe toggle may beextended during the operation of the booster-bar 46f Such extension is provided by y a housing with which the {lower portion' of the link26 has i telescopic" engagement A spring 92 jnormally holds the link 26 in shortened position and a collar 94 mounted on the lowerporti'on of the link :26 limits the extent to which the spring 92 may" thrust the 7 lower portion-of the link 26 into the housing 90. Preferably the members 82 are formed integral with the housing 90; these' p'arts shown in the drawings as a single casting or, forging; This particular means of forming an extends invention;- f'

ible togglelinkforms no part ofthe present atecl to move the pressing head 11 into light contact with the buck 18. During this move- I -ment ,of the pressing head into preliminary closed position the toggle consisting-of the links 24 and 26 will move toward straightened v position and the link 24 together with the V floating shoe or bearingmember 70 will move into position over the end of the boosterbar 46.

When the operator wishes to apply final heavy pressure he will admit working fluid to the fluid motor 52 which will move the- ;pry-bar 48 in a clockwise direction about its pivotal'mounting 50 so that theroller 62 will raise the end of the booster-bar 46 and bringthe face of the bearing portion 64into contact with the bearing face of the floating shoe or bearing member 70. It will be obvious that if the work on the buck is thick the toggle will not move as fartoward straightened position in which case the bearing member YO-will have movedonly a slight distance 5 over the bearing portion 64. If the workior the padding on the buck is thin the toggle willmove much nearer to straightened posis tion and the bearing member will move fur ther along the bearing portion 64.

Since the face and the arc of travel of the bearing member 7 0 and the curve of the face of the bearing portion 64 are both about the same pivotal connection 28as a center, it j i will be obvious that the clearance between the bearing member 70 and the bearing portion '68 will remain the same regardless of how close the toggle approaches to straight ened position.

When the end of the boosterbar 46 is raised to apply heavy pressure to the pressing elements the booster-bar'46will move about its pivotal connection 47. This C movement of the booster-bar 46 will cause the ingmember 70'is mounted so that it may'also face of the bearing portion 64 to shift so that its center of curvature no longer coincides with the pivotal connection 28. The bearshift and always maintain its surface contact with theface of'the bearing portion 64. Due to the area of surface contact between the bearing faces of the bearing member 7 O and the bearing portion 68 there is no danger of ridges being formed in the face of the bearing portion 64 due to excessive pressure when the mechanism is operated to apply heavy pressure to the pressing elements:

I dspirit of the inventionasset forth in the ap-.

The invention is illustrated in its preferred 3 embodiment but changes and modifications may be made without departing from the pended claims.

fWhat I claim is: I '1. In apressing machine, cooperating effecting. the applying of pressure to the pressing elements including a pry bar having a; bearing surface 1 extending lengthwise thereof; and'motion transmitting means be-- tween the prybar and the-movable element including a member, connections between it and the movableelement, said. member being arranged at an angle to-the pry bar, and a shoepivotally connected to said member and slidable along the bearing surface on the pry bar upon preliminary closing of the press and making and maintaining surface contact with said pry bar during operation of the pry bar.

2. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other; mechanism for effecting the applying of pressure to the pressing elements including a pry bar having a bearing surface extending lengthwise thereof; and motion transmittin means between the pry bar and the mova le element including a member, connections between it and the movable element, said member being arranged at an angle to the pry bar, a shoe pivotally connected to said member and slidable along the bearing surface on the pry bar upon preliminary closing of the press and making and maintaining surface contact with said pry bar during operation of the pry bar; and means for resisting relative Ipivotal movement of the shoe and the mem- 3. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other; mechanism for effecting the applying of pressure to the pressing elements including a pry bar having a bearing surface extending lengthwise thereof; and motion transmitting means normally out of engagement with the pry bar and movable into engagement therewith by a preliminary closing of the press; said motiontransmitting means including a yoke for carrying the movable pressing element, a link pivotally connected at its upper end to theyoke, and a shoe pivotally connected to the lower end of said link and having a bearing surface complemental to and coacting with the bean ing surface on the pry bar.

4. In a pressing machine, cooperating pressing elements, one of which is movable mally] out of engagement with the pry bar and movable into engagement, therewith by a preliminary closing of the press; said motion transmitting means including a yoke for carrying the movable pressing element, a

link pivotally connected at its upper end to th yoke, a h de fpi Yotally connqcted to" lower end of said link and having a zbearl ng SuPfaGQ complemental; to and. coa'ctlng Wlth" for '2 resisting relative pivotal movement of the shoe andf'thelinkf V.

I I n'testimonyizwherof; I fhave hereunto; signedi-mynanig atf Syraciiseyin the 'ckqunty I offOnondagayand State of New York this 30thday of March,' 1931;-a" 1 -ERNEST DAVISQ I z I jthebearing surface on/the-prybar, an c' l;means Y V V 

